diff --git a/.github/workflows/CI-build-and-test.yml b/.github/workflows/CI-build-and-test.yml
index 8bb402a..48b0086 100644
--- a/.github/workflows/CI-build-and-test.yml
+++ b/.github/workflows/CI-build-and-test.yml
@@ -38,7 +38,7 @@ jobs:
     - name: Configure CMake
       # Configure CMake in a 'build' subdirectory. `CMAKE_BUILD_TYPE` is only required if you are using a single-configuration generator such as make.
       # See https://cmake.org/cmake/help/latest/variable/CMAKE_BUILD_TYPE.html?highlight=cmake_build_type
-      run: cmake -DCMAKE_PREFIX_PATH=`python3 -c 'import torch;print(torch.utils.cmake_prefix_path)'` -B ${{github.workspace}}/build -DCMAKE_BUILD_TYPE=${{env.BUILD_TYPE}}
+      run: cmake -DTEST_COVERAGE=ON -DCMAKE_PREFIX_PATH=`python3 -c 'import torch;print(torch.utils.cmake_prefix_path)'` -B ${{github.workspace}}/build -DCMAKE_BUILD_TYPE=${{env.BUILD_TYPE}}
 
     - name: Build
       # Build your program with the given configuration
@@ -50,3 +50,14 @@ jobs:
       # See https://cmake.org/cmake/help/latest/manual/ctest.1.html for more detail
       run: ctest -C ${{env.BUILD_TYPE}}
 
+    - name: Generate Coverage Report
+      working-directory: ${{github.workspace}}/build
+      run: gcovr --json -o nuTens_coverage.json -r .. -f "../nuTens/*"
+      
+    - name: Upload coverage reports to Codecov
+      uses: codecov/codecov-action@v4.0.1
+      with:
+        verbose: true
+        files: nuTens_coverage.json
+      env:
+        CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4a7d26f..835dee6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,5 +1,20 @@
 cmake_minimum_required(VERSION 3.18 FATAL_ERROR)
 set(CMAKE_CXX_STANDARD 17)
+
+OPTION(TEST_COVERAGE "TEST_COVERAGE" OFF)
+
+IF(TEST_COVERAGE)
+    message("Adding flags to check test coverage")
+    #SET(CMAKE_CXX_FLAGS "--coverage -g -O0")
+    #SET(CMAKE_C_FLAGS "--coverage -g -O0")
+    #SET(CMAKE_EXE_LINKER_FLAGS "--coverage -g -O0")
+    add_compile_options("--coverage")
+    add_link_options("--coverage")
+ELSE()
+    message("Won't check test coverage")
+ENDIF()
+
+
 project(nuTens)
 enable_testing()
 
diff --git a/PyTorch_requirements.txt b/PyTorch_requirements.txt
index 0e78035..030704d 100644
--- a/PyTorch_requirements.txt
+++ b/PyTorch_requirements.txt
@@ -1,5 +1,6 @@
 attrs==23.2.0
 filelock==3.15.4
+gcovr==7.2
 jinja2==3.1.4
 jsonschema-specifications==2023.12.1
 MarkupSafe==2.1.3
diff --git a/README.md b/README.md
index 82f4b90..7c01b9c 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@ nuTens is a software library which uses [tensors](https://en.wikipedia.org/wiki/
 
 [![CI badge](https://github.com/ewanwm/nuTens/actions/workflows/CI-build-and-test.yml/badge.svg)](https://github.com/ewanwm/nuTens/actions/workflows/CI-build-and-test.yml)
 [![Code - Doxygen](https://img.shields.io/badge/Code-Doxygen-2ea44f)](https://ewanwm.github.io/nuTens/index.html)
-
+[![test - coverage](https://codecov.io/github/ewanwm/nuTens/graph/badge.svg?token=PJ8C8CX37O)](https://codecov.io/github/ewanwm/nuTens)
 
 ## Installation
 ### Requirements
@@ -43,7 +43,7 @@ make test
 - [x] Basic test suite
 - [x] Basic CI
 - [x] Doxygen documentation with automatic deployment
-- [ ] Add test coverage checks into CI
+- [x] Add test coverage checks into CI
 - [ ] Integrate linting ( [cpp-linter](https://github.com/cpp-linter)? )
 - [ ] Add instrumentation library for benchmarking and profiling
 - [ ] Add suite of benchmarking tests